Moved and renamed some tool-related files.

(bzr r12785)

1 files changed, 1496 insertions, 0 deletions

diff --git a/src/ui/tools/connector-tool.cpp b/src/ui/tools/connector-tool.cpp
new file mode 100644
index 000000000..36e013ba8
--- /dev/null
+++ b/src/ui/tools/connector-tool.cpp
@@ -0,0 +1,1496 @@
+/*
+ * Connector creation tool
+ *
+ * Authors:
+ *   Michael Wybrow <mjwybrow@users.sourceforge.net>
+ *   Abhishek Sharma
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Martin Owens <doctormo@gmail.com>
+ *
+ * Copyright (C) 2005-2008  Michael Wybrow
+ * Copyright (C) 2009  Monash University
+ * Copyright (C) 2012  Authors
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ *
+ * TODO:
+ *  o  Show a visual indicator for objects with the 'avoid' property set.
+ *  o  Allow user to change a object between a path and connector through
+ *     the interface.
+ *  o  Create an interface for setting markers (arrow heads).
+ *  o  Better distinguish between paths and connectors to prevent problems
+ *     in the node tool and paths accidentally being turned into connectors
+ *     in the connector tool.  Perhaps have a way to convert between.
+ *  o  Only call libavoid's updateEndPoint as required.  Currently we do it
+ *     for both endpoints, even if only one is moving.
+ *  o  Deal sanely with connectors with both endpoints attached to the
+ *     same connection point, and drawing of connectors attaching
+ *     overlapping shapes (currently tries to adjust connector to be
+ *     outside both bounding boxes).
+ *  o  Fix many special cases related to connectors updating,
+ *     e.g., copying a couple of shapes and a connector that are
+ *           attached to each other.
+ *     e.g., detach connector when it is moved or transformed in
+ *           one of the other contexts.
+ *  o  Cope with shapes whose ids change when they have attached
+ *     connectors.
+ *  o  During dragging motion, gobble up to and use the final motion event.
+ *     Gobbling away all duplicates after the current can occasionally result
+ *     in the path lagging behind the mouse cursor if it is no longer being
+ *     dragged.
+ *  o  Fix up libavoid's representation after undo actions.  It doesn't see
+ *     any transform signals and hence doesn't know shapes have moved back to
+ *     there earlier positions.
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * Notes:
+ *
+ *  Much of the way connectors work for user-defined points has been
+ *  changed so that it no longer defines special attributes to record
+ *  the points. Instead it uses single node paths to define points
+ *  who are then seperate objects that can be fixed on the canvas,
+ *  grouped into objects and take full advantage of all transform, snap
+ *  and align functionality of all other objects.
+ *
+ * 	I think that the style change between polyline and orthogonal
+ * 	would be much clearer with two buttons (radio behaviour -- just
+ * 	one is true).
+ *
+ * 	The other tools show a label change from "New:" to "Change:"
+ * 	depending on whether an object is selected.  We could consider
+ * 	this but there may not be space.
+ *
+ * 	Likewise for the avoid/ignore shapes buttons.  These should be
+ * 	inactive when a shape is not selected in the connector context.
+ *
+ */
+
+
+
+#include <gdk/gdkkeysyms.h>
+#include <string>
+#include <cstring>
+
+#include "ui/tools/connector-tool.h"
+#include "pixmaps/cursor-connector.xpm"
+#include "xml/node-event-vector.h"
+#include "xml/repr.h"
+#include "svg/svg.h"
+#include "desktop.h"
+#include "desktop-style.h"
+#include "desktop-handles.h"
+#include "document.h"
+#include "document-undo.h"
+#include "message-context.h"
+#include "message-stack.h"
+#include "selection.h"
+#include "inkscape.h"
+#include "preferences.h"
+#include "sp-path.h"
+#include "display/sp-canvas.h"
+#include "display/canvas-bpath.h"
+#include "display/sodipodi-ctrl.h"
+#include <glibmm/i18n.h>
+#include <glibmm/stringutils.h>
+#include "snap.h"
+#include "knot.h"
+#include "sp-conn-end.h"
+#include "sp-conn-end-pair.h"
+#include "conn-avoid-ref.h"
+#include "libavoid/vertices.h"
+#include "libavoid/router.h"
+#include "context-fns.h"
+#include "sp-namedview.h"
+#include "sp-text.h"
+#include "sp-flowtext.h"
+#include "display/curve.h"
+#include "verbs.h"
+
+using Inkscape::DocumentUndo;
+
+#include "tool-factory.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+// Stuff borrowed from DrawContext
+static void spcc_connector_set_initial_point(ConnectorTool *cc, Geom::Point const p);
+static void spcc_connector_set_subsequent_point(ConnectorTool *cc, Geom::Point const p);
+static void spcc_connector_finish_segment(ConnectorTool *cc, Geom::Point p);
+static void spcc_reset_colors(ConnectorTool *cc);
+static void spcc_connector_finish(ConnectorTool *cc);
+static void spcc_concat_colors_and_flush(ConnectorTool *cc);
+static void spcc_flush_white(ConnectorTool *cc, SPCurve *gc);
+
+// Context event handlers
+static gint connector_handle_button_press(ConnectorTool *const cc, GdkEventButton const &bevent);
+static gint connector_handle_motion_notify(ConnectorTool *const cc, GdkEventMotion const &mevent);
+static gint connector_handle_button_release(ConnectorTool *const cc, GdkEventButton const &revent);
+static gint connector_handle_key_press(ConnectorTool *const cc, guint const keyval);
+
+static void cc_active_shape_add_knot(ConnectorTool *cc, SPItem* item);
+static void cc_set_active_shape(ConnectorTool *cc, SPItem *item);
+static void cc_clear_active_knots(SPKnotList k);
+static void cc_clear_active_shape(ConnectorTool *cc);
+static void cc_set_active_conn(ConnectorTool *cc, SPItem *item);
+static void cc_clear_active_conn(ConnectorTool *cc);
+static bool conn_pt_handle_test(ConnectorTool *cc, Geom::Point& p, gchar **href);
+static void cc_select_handle(SPKnot* knot);
+static void cc_deselect_handle(SPKnot* knot);
+static bool cc_item_is_shape(SPItem *item);
+static void cc_connector_rerouting_finish(ConnectorTool *const cc,
+        Geom::Point *const p);
+
+static void shape_event_attr_deleted(Inkscape::XML::Node *repr,
+        Inkscape::XML::Node *child, Inkscape::XML::Node *ref, gpointer data);
+static void shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
+        gchar const *old_value, gchar const *new_value, bool is_interactive,
+        gpointer data);
+
+/*static Geom::Point connector_drag_origin_w(0, 0);
+static bool connector_within_tolerance = false;*/
+
+static Inkscape::XML::NodeEventVector shape_repr_events = {
+    NULL, /* child_added */
+    NULL, /* child_added */
+    shape_event_attr_changed,
+    NULL, /* content_changed */
+    NULL  /* order_changed */
+};
+
+static Inkscape::XML::NodeEventVector layer_repr_events = {
+    NULL, /* child_added */
+    shape_event_attr_deleted,
+    NULL, /* child_added */
+    NULL, /* content_changed */
+    NULL  /* order_changed */
+};
+
+namespace {
+	ToolBase* createConnectorContext() {
+		return new ConnectorTool();
+	}
+
+	bool connectorContextRegistered = ToolFactory::instance().registerObject("/tools/connector", createConnectorContext);
+}
+
+const std::string& ConnectorTool::getPrefsPath() {
+	return ConnectorTool::prefsPath;
+}
+
+const std::string ConnectorTool::prefsPath = "/tools/connector";
+
+ConnectorTool::ConnectorTool() : ToolBase() {
+	this->red_curve = 0;
+	this->isOrthogonal = false;
+	this->c1 = 0;
+	this->red_bpath = 0;
+	this->green_curve = 0;
+	this->selection = 0;
+	this->cl0 = 0;
+	this->cl1 = 0;
+	this->c0 = 0;
+
+    this->cursor_shape = cursor_connector_xpm;
+    this->hot_x = 1;
+    this->hot_y = 1;
+    this->xp = 0;
+    this->yp = 0;
+
+    this->red_color = 0xff00007f;
+
+    this->newconn = NULL;
+    this->newConnRef = NULL;
+    this->curvature = 0.0;
+
+    this->sel_changed_connection = sigc::connection();
+
+    this->active_shape = NULL;
+    this->active_shape_repr = NULL;
+    this->active_shape_layer_repr = NULL;
+
+    this->active_conn = NULL;
+    this->active_conn_repr = NULL;
+
+    this->active_handle = NULL;
+
+    this->selected_handle = NULL;
+
+    this->clickeditem = NULL;
+    this->clickedhandle = NULL;
+
+    for (int i = 0; i < 2; ++i) {
+        this->endpt_handle[i] = NULL;
+        this->endpt_handler_id[i] = 0;
+    }
+    
+    this->shref = NULL;
+    this->ehref = NULL;
+    this->npoints = 0;
+    this->state = SP_CONNECTOR_CONTEXT_IDLE;
+}
+
+ConnectorTool::~ConnectorTool() {
+    this->sel_changed_connection.disconnect();
+
+    for (int i = 0; i < 2; ++i) {
+        if (this->endpt_handle[1]) {
+            g_object_unref(this->endpt_handle[i]);
+            this->endpt_handle[i] = NULL;
+        }
+    }
+    
+    if (this->shref) {
+        g_free(this->shref);
+        this->shref = NULL;
+    }
+    
+    if (this->ehref) {
+        g_free(this->shref);
+        this->shref = NULL;
+    }
+    
+    g_assert( this->newConnRef == NULL );
+}
+
+void ConnectorTool::setup() {
+    ToolBase::setup();
+
+    this->selection = sp_desktop_selection(this->desktop);
+
+    this->sel_changed_connection.disconnect();
+    this->sel_changed_connection = this->selection->connectChanged(
+    	sigc::mem_fun(this, &ConnectorTool::selection_changed)
+    );
+
+    /* Create red bpath */
+    this->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(this->desktop), NULL);
+    sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(this->red_bpath), this->red_color,
+            1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+    sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(this->red_bpath), 0x00000000,
+            SP_WIND_RULE_NONZERO);
+    /* Create red curve */
+    this->red_curve = new SPCurve();
+
+    /* Create green curve */
+    this->green_curve = new SPCurve();
+
+    // Notice the initial selection.
+    //cc_selection_changed(this->selection, (gpointer) this);
+    this->selection_changed(this->selection);
+
+    this->within_tolerance = false;
+
+    sp_event_context_read(this, "curvature");
+    sp_event_context_read(this, "orthogonal");
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (prefs->getBool("/tools/connector/selcue", 0)) {
+        this->enableSelectionCue();
+    }
+
+    // Make sure we see all enter events for canvas items,
+    // even if a mouse button is depressed.
+    this->desktop->canvas->gen_all_enter_events = true;
+}
+
+void ConnectorTool::set(const Inkscape::Preferences::Entry& val) {
+    /* fixme: Proper error handling for non-numeric data.  Use a locale-independent function like
+     * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
+    Glib::ustring name = val.getEntryName();
+    
+    if (name == "curvature") {
+        this->curvature = val.getDoubleLimited(); // prevents NaN and +/-Inf from messing up
+    } else if (name == "orthogonal") {
+        this->isOrthogonal = val.getBool();
+    }
+}
+
+void ConnectorTool::finish() {
+    spcc_connector_finish(this);
+    this->state = SP_CONNECTOR_CONTEXT_IDLE;
+
+    ToolBase::finish();
+
+    if (this->selection) {
+        this->selection = NULL;
+    }
+
+    cc_clear_active_shape(this);
+    cc_clear_active_conn(this);
+
+    // Restore the default event generating behaviour.
+    this->desktop->canvas->gen_all_enter_events = false;
+}
+
+//-----------------------------------------------------------------------------
+
+
+static void
+cc_clear_active_shape(ConnectorTool *cc)
+{
+    if (cc->active_shape == NULL) {
+        return;
+    }
+    g_assert( cc->active_shape_repr );
+    g_assert( cc->active_shape_layer_repr );
+
+    cc->active_shape = NULL;
+
+    if (cc->active_shape_repr) {
+        sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
+        Inkscape::GC::release(cc->active_shape_repr);
+        cc->active_shape_repr = NULL;
+
+        sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
+        Inkscape::GC::release(cc->active_shape_layer_repr);
+        cc->active_shape_layer_repr = NULL;
+    }
+
+    cc_clear_active_knots(cc->knots);
+}
+
+static void
+cc_clear_active_knots(SPKnotList k)
+{
+    // Hide the connection points if they exist.
+    if (k.size()) {
+        for (SPKnotList::iterator it = k.begin(); it != k.end(); ++it) {
+            sp_knot_hide(it->first);
+        }
+    }
+}
+
+static void
+cc_clear_active_conn(ConnectorTool *cc)
+{
+    if (cc->active_conn == NULL) {
+        return;
+    }
+    g_assert( cc->active_conn_repr );
+
+    cc->active_conn = NULL;
+
+    if (cc->active_conn_repr) {
+        sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
+        Inkscape::GC::release(cc->active_conn_repr);
+        cc->active_conn_repr = NULL;
+    }
+
+    // Hide the endpoint handles.
+    for (int i = 0; i < 2; ++i) {
+        if (cc->endpt_handle[i]) {
+            sp_knot_hide(cc->endpt_handle[i]);
+        }
+    }
+}
+
+
+static bool
+conn_pt_handle_test(ConnectorTool *cc, Geom::Point& p, gchar **href)
+{
+    if (cc->active_handle && (cc->knots.find(cc->active_handle) != cc->knots.end()))
+    {
+        p = cc->active_handle->pos;
+        *href = g_strdup_printf("#%s", cc->active_handle->owner->getId());
+        return true;
+    }
+    *href = NULL;
+    return false;
+}
+
+static void
+cc_select_handle(SPKnot* knot)
+{
+    knot->setShape(SP_KNOT_SHAPE_SQUARE);
+    knot->setSize(10);
+    knot->setAnchor(SP_ANCHOR_CENTER);
+    knot->setFill(0x0000ffff, 0x0000ffff, 0x0000ffff);
+    sp_knot_update_ctrl(knot);
+}
+
+static void
+cc_deselect_handle(SPKnot* knot)
+{
+    knot->setShape(SP_KNOT_SHAPE_SQUARE);
+    knot->setSize(8);
+    knot->setAnchor(SP_ANCHOR_CENTER);
+    knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
+    sp_knot_update_ctrl(knot);
+}
+
+bool ConnectorTool::item_handler(SPItem* item, GdkEvent* event) {
+    gint ret = FALSE;
+
+    Geom::Point p(event->button.x, event->button.y);
+
+    switch (event->type) {
+        case GDK_BUTTON_RELEASE:
+            if (event->button.button == 1 && !this->space_panning) {
+                if ((this->state == SP_CONNECTOR_CONTEXT_DRAGGING) && this->within_tolerance) {
+                    spcc_reset_colors(this);
+                    this->state = SP_CONNECTOR_CONTEXT_IDLE;
+                }
+
+                if (this->state != SP_CONNECTOR_CONTEXT_IDLE) {
+                    // Doing something else like rerouting.
+                    break;
+                }
+
+                // find out clicked item, honoring Alt
+                SPItem *item = sp_event_context_find_item(desktop, p, event->button.state & GDK_MOD1_MASK, FALSE);
+
+                if (event->button.state & GDK_SHIFT_MASK) {
+                    this->selection->toggle(item);
+                } else {
+                    this->selection->set(item);
+                    /* When selecting a new item, do not allow showing
+                       connection points on connectors. (yet?)
+                    */
+
+                    if (item != this->active_shape && !cc_item_is_connector(item)) {
+                        cc_set_active_shape(this, item);
+                    }
+                }
+
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_ENTER_NOTIFY:
+            if (!this->selected_handle) {
+                if (cc_item_is_shape(item)) {
+                    cc_set_active_shape(this, item);
+                }
+
+                ret = TRUE;
+            }
+            break;
+
+        default:
+            break;
+    }
+
+    return ret;
+}
+
+bool ConnectorTool::root_handler(GdkEvent* event) {
+    gint ret = FALSE;
+
+    switch (event->type) {
+        case GDK_BUTTON_PRESS:
+            ret = connector_handle_button_press(this, event->button);
+            break;
+
+        case GDK_MOTION_NOTIFY:
+            ret = connector_handle_motion_notify(this, event->motion);
+            break;
+
+        case GDK_BUTTON_RELEASE:
+            ret = connector_handle_button_release(this, event->button);
+            break;
+
+        case GDK_KEY_PRESS:
+            ret = connector_handle_key_press(this, get_group0_keyval (&event->key));
+            break;
+
+        default:
+            break;
+    }
+
+    if (!ret) {
+    	ret = ToolBase::root_handler(event);
+    }
+
+    return ret;
+}
+
+
+static gint
+connector_handle_button_press(ConnectorTool *const cc, GdkEventButton const &bevent)
+{
+    Geom::Point const event_w(bevent.x, bevent.y);
+    /* Find desktop coordinates */
+    Geom::Point p = cc->desktop->w2d(event_w);
+    ToolBase *event_context = SP_EVENT_CONTEXT(cc);
+
+    gint ret = FALSE;
+
+        if ( bevent.button == 1 && !event_context->space_panning ) {
+
+            SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
+
+            if (Inkscape::have_viable_layer(desktop, cc->message_context) == false) {
+                return TRUE;
+            }
+
+            Geom::Point const event_w(bevent.x,
+                                    bevent.y);
+
+            cc->xp = bevent.x;
+            cc->yp = bevent.y;
+            cc->within_tolerance = true;
+
+            Geom::Point const event_dt = cc->desktop->w2d(event_w);
+
+            SnapManager &m = cc->desktop->namedview->snap_manager;
+
+            switch (cc->state) {
+                case SP_CONNECTOR_CONTEXT_STOP:
+                    /* This is allowed, if we just canceled curve */
+                case SP_CONNECTOR_CONTEXT_IDLE:
+                {
+                    if ( cc->npoints == 0 ) {
+                        cc_clear_active_conn(cc);
+
+                        SP_EVENT_CONTEXT_DESKTOP(cc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new connector"));
+
+                        /* Set start anchor */
+                        /* Create green anchor */
+                        Geom::Point p = event_dt;
+
+                        // Test whether we clicked on a connection point
+                        bool found = conn_pt_handle_test(cc, p, &cc->shref);
+
+                        if (!found) {
+                            // This is the first point, so just snap it to the grid
+                            // as there's no other points to go off.
+                            m.setup(cc->desktop);
+                            m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                            m.unSetup();
+                        }
+                        spcc_connector_set_initial_point(cc, p);
+
+                    }
+                    cc->state = SP_CONNECTOR_CONTEXT_DRAGGING;
+                    ret = TRUE;
+                    break;
+                }
+                case SP_CONNECTOR_CONTEXT_DRAGGING:
+                {
+                    // This is the second click of a connector creation.
+                    m.setup(cc->desktop);
+                    m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                    m.unSetup();
+
+                    spcc_connector_set_subsequent_point(cc, p);
+                    spcc_connector_finish_segment(cc, p);
+                   
+                    conn_pt_handle_test(cc, p, &cc->ehref);
+                    if (cc->npoints != 0) {
+                        spcc_connector_finish(cc);
+                    }
+                    cc_set_active_conn(cc, cc->newconn);
+                    cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                    ret = TRUE;
+                    break;
+                }
+                case SP_CONNECTOR_CONTEXT_CLOSE:
+                {
+                    g_warning("Button down in CLOSE state");
+                    break;
+                }
+                default:
+                    break;
+            }
+        } else if (bevent.button == 3) {
+            if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
+                // A context menu is going to be triggered here,
+                // so end the rerouting operation.
+                cc_connector_rerouting_finish(cc, &p);
+
+                cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+
+                // Don't set ret to TRUE, so we drop through to the
+                // parent handler which will open the context menu.
+            }
+            else if (cc->npoints != 0) {
+                spcc_connector_finish(cc);
+                cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                ret = TRUE;
+            }
+        }
+    return ret;
+}
+
+static gint
+connector_handle_motion_notify(ConnectorTool *const cc, GdkEventMotion const &mevent)
+{
+    gint ret = FALSE;
+    ToolBase *event_context = SP_EVENT_CONTEXT(cc);
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    if (event_context->space_panning || mevent.state & GDK_BUTTON2_MASK || mevent.state & GDK_BUTTON3_MASK) {
+        // allow middle-button scrolling
+        return FALSE;
+    }
+
+    Geom::Point const event_w(mevent.x, mevent.y);
+
+    if (cc->within_tolerance) {
+        cc->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+        if ( ( abs( (gint) mevent.x - cc->xp ) < cc->tolerance ) &&
+             ( abs( (gint) mevent.y - cc->yp ) < cc->tolerance ) ) {
+            return FALSE;   // Do not drag if we're within tolerance from origin.
+        }
+    }
+    // Once the user has moved farther than tolerance from the original location
+    // (indicating they intend to move the object, not click), then always process
+    // the motion notify coordinates as given (no snapping back to origin)
+    cc->within_tolerance = false;
+
+    SPDesktop *const dt = cc->desktop;
+
+    /* Find desktop coordinates */
+    Geom::Point p = dt->w2d(event_w);
+
+        SnapManager &m = dt->namedview->snap_manager;
+
+        switch (cc->state) {
+            case SP_CONNECTOR_CONTEXT_DRAGGING:
+            {
+                gobble_motion_events(mevent.state);
+                // This is movement during a connector creation.
+                if ( cc->npoints > 0 ) {
+                    m.setup(dt);
+                    m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                    m.unSetup();
+                    cc->selection->clear();
+                    spcc_connector_set_subsequent_point(cc, p);
+                    ret = TRUE;
+                }
+                break;
+            }
+            case SP_CONNECTOR_CONTEXT_REROUTING:
+            {
+                gobble_motion_events(GDK_BUTTON1_MASK);
+                g_assert( SP_IS_PATH(cc->clickeditem));
+
+                m.setup(dt);
+                m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                m.unSetup();
+
+                // Update the hidden path
+                Geom::Affine i2d ( (cc->clickeditem)->i2dt_affine() );
+                Geom::Affine d2i = i2d.inverse();
+                SPPath *path = SP_PATH(cc->clickeditem);
+                SPCurve *curve = path->get_curve();
+                if (cc->clickedhandle == cc->endpt_handle[0]) {
+                    Geom::Point o = cc->endpt_handle[1]->pos;
+                    curve->stretch_endpoints(p * d2i, o * d2i);
+                }
+                else {
+                    Geom::Point o = cc->endpt_handle[0]->pos;
+                    curve->stretch_endpoints(o * d2i, p * d2i);
+                }
+                sp_conn_reroute_path_immediate(path);
+
+                // Copy this to the temporary visible path
+                cc->red_curve = path->get_curve_for_edit();
+                cc->red_curve->transform(i2d);
+
+                sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
+                ret = TRUE;
+                break;
+            }
+            case SP_CONNECTOR_CONTEXT_STOP:
+                /* This is perfectly valid */
+                break;
+            default:
+                if (!sp_event_context_knot_mouseover(cc)) {
+                    m.setup(dt);
+                    m.preSnap(Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_OTHER_HANDLE));
+                    m.unSetup();
+                }
+                break;
+        }
+    return ret;
+}
+
+static gint
+connector_handle_button_release(ConnectorTool *const cc, GdkEventButton const &revent)
+{
+    gint ret = FALSE;
+    ToolBase *event_context = SP_EVENT_CONTEXT(cc);
+    if ( revent.button == 1 && !event_context->space_panning ) {
+
+        SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
+        SPDocument *doc = sp_desktop_document(desktop);
+
+        SnapManager &m = desktop->namedview->snap_manager;
+
+        Geom::Point const event_w(revent.x, revent.y);
+
+        /* Find desktop coordinates */
+        Geom::Point p = cc->desktop->w2d(event_w);
+
+            switch (cc->state) {
+                //case SP_CONNECTOR_CONTEXT_POINT:
+                case SP_CONNECTOR_CONTEXT_DRAGGING:
+                {
+                    m.setup(desktop);
+                    m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                    m.unSetup();
+
+                    if (cc->within_tolerance)
+                    {
+                        spcc_connector_finish_segment(cc, p);
+                        return TRUE;
+                    }
+                    // Connector has been created via a drag, end it now.
+                    spcc_connector_set_subsequent_point(cc, p);
+                    spcc_connector_finish_segment(cc, p);
+                    // Test whether we clicked on a connection point
+                    conn_pt_handle_test(cc, p, &cc->ehref);
+                    if (cc->npoints != 0) {
+                        spcc_connector_finish(cc);
+                    }
+                    cc_set_active_conn(cc, cc->newconn);
+                    cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                    break;
+                }
+                case SP_CONNECTOR_CONTEXT_REROUTING:
+                {
+                    m.setup(desktop);
+                    m.freeSnapReturnByRef(p, Inkscape::SNAPSOURCE_OTHER_HANDLE);
+                    m.unSetup();
+                    cc_connector_rerouting_finish(cc, &p);
+
+                    doc->ensureUpToDate();
+                    cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                    return TRUE;
+                    break;
+                }
+                case SP_CONNECTOR_CONTEXT_STOP:
+                    /* This is allowed, if we just cancelled curve */
+                    break;
+                default:
+                    break;
+            }
+            ret = TRUE;
+        }
+    return ret;
+}
+
+static gint
+connector_handle_key_press(ConnectorTool *const cc, guint const keyval)
+{
+    gint ret = FALSE;
+
+        switch (keyval) {
+            case GDK_KEY_Return:
+            case GDK_KEY_KP_Enter:
+                if (cc->npoints != 0) {
+                    spcc_connector_finish(cc);
+                    cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                    ret = TRUE;
+                }
+                break;
+            case GDK_KEY_Escape:
+                if (cc->state == SP_CONNECTOR_CONTEXT_REROUTING) {
+
+                    SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
+                    SPDocument *doc = sp_desktop_document(desktop);
+
+                    cc_connector_rerouting_finish(cc, NULL);
+
+                    DocumentUndo::undo(doc);
+
+                    cc->state = SP_CONNECTOR_CONTEXT_IDLE;
+                    desktop->messageStack()->flash( Inkscape::NORMAL_MESSAGE,
+                            _("Connector endpoint drag cancelled."));
+                    ret = TRUE;
+                }
+                else if (cc->npoints != 0) {
+                    // if drawing, cancel, otherwise pass it up for deselecting
+                    cc->state = SP_CONNECTOR_CONTEXT_STOP;
+                    spcc_reset_colors(cc);
+                    ret = TRUE;
+                }
+                break;
+            default:
+                break;
+        }
+    return ret;
+}
+
+
+static void
+cc_connector_rerouting_finish(ConnectorTool *const cc, Geom::Point *const p)
+{
+    SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
+    SPDocument *doc = sp_desktop_document(desktop);
+
+    // Clear the temporary path:
+    cc->red_curve->reset();
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
+
+    if (p != NULL)
+    {
+        // Test whether we clicked on a connection point
+        gchar *shape_label;
+        bool found = conn_pt_handle_test(cc, *p, &shape_label);
+
+        if (found) {
+            if (cc->clickedhandle == cc->endpt_handle[0]) {
+                cc->clickeditem->setAttribute("inkscape:connection-start", shape_label, NULL);
+            }
+            else {
+                cc->clickeditem->setAttribute("inkscape:connection-end", shape_label, NULL);
+            }
+            g_free(shape_label);
+        }
+    }
+    cc->clickeditem->setHidden(false);
+    sp_conn_reroute_path_immediate(SP_PATH(cc->clickeditem));
+    cc->clickeditem->updateRepr();
+    DocumentUndo::done(doc, SP_VERB_CONTEXT_CONNECTOR,
+                     _("Reroute connector"));
+    cc_set_active_conn(cc, cc->clickeditem);
+}
+
+
+static void
+spcc_reset_colors(ConnectorTool *cc)
+{
+    /* Red */
+    cc->red_curve->reset();
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
+
+    cc->green_curve->reset();
+    cc->npoints = 0;
+}
+
+
+static void
+spcc_connector_set_initial_point(ConnectorTool *const cc, Geom::Point const p)
+{
+    g_assert( cc->npoints == 0 );
+
+    cc->p[0] = p;
+    cc->p[1] = p;
+    cc->npoints = 2;
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
+}
+
+
+static void
+spcc_connector_set_subsequent_point(ConnectorTool *const cc, Geom::Point const p)
+{
+    g_assert( cc->npoints != 0 );
+
+    SPDesktop *dt = cc->desktop;
+    Geom::Point o = dt->dt2doc(cc->p[0]);
+    Geom::Point d = dt->dt2doc(p);
+    Avoid::Point src(o[Geom::X], o[Geom::Y]);
+    Avoid::Point dst(d[Geom::X], d[Geom::Y]);
+
+    if (!cc->newConnRef) {
+        Avoid::Router *router = sp_desktop_document(dt)->router;
+        cc->newConnRef = new Avoid::ConnRef(router);
+        cc->newConnRef->setEndpoint(Avoid::VertID::src, src);
+        if (cc->isOrthogonal)
+            cc->newConnRef->setRoutingType(Avoid::ConnType_Orthogonal);
+        else
+            cc->newConnRef->setRoutingType(Avoid::ConnType_PolyLine);
+    }
+    // Set new endpoint.
+    cc->newConnRef->setEndpoint(Avoid::VertID::tar, dst);
+    // Immediately generate new routes for connector.
+    cc->newConnRef->makePathInvalid();
+    cc->newConnRef->router()->processTransaction();
+    // Recreate curve from libavoid route.
+    recreateCurve( cc->red_curve, cc->newConnRef, cc->curvature );
+    cc->red_curve->transform(dt->doc2dt());
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
+}
+
+
+/**
+ * Concats red, blue and green.
+ * If any anchors are defined, process these, optionally removing curves from white list
+ * Invoke _flush_white to write result back to object.
+ */
+static void
+spcc_concat_colors_and_flush(ConnectorTool *cc)
+{
+    SPCurve *c = cc->green_curve;
+    cc->green_curve = new SPCurve();
+
+    cc->red_curve->reset();
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), NULL);
+
+    if (c->is_empty()) {
+        c->unref();
+        return;
+    }
+
+    spcc_flush_white(cc, c);
+
+    c->unref();
+}
+
+
+/*
+ * Flushes white curve(s) and additional curve into object
+ *
+ * No cleaning of colored curves - this has to be done by caller
+ * No rereading of white data, so if you cannot rely on ::modified, do it in caller
+ *
+ */
+
+static void
+spcc_flush_white(ConnectorTool *cc, SPCurve *gc)
+{
+    SPCurve *c;
+
+    if (gc) {
+        c = gc;
+        c->ref();
+    } else {
+        return;
+    }
+
+    /* Now we have to go back to item coordinates at last */
+    c->transform(SP_EVENT_CONTEXT_DESKTOP(cc)->dt2doc());
+
+    SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(cc);
+    SPDocument *doc = sp_desktop_document(desktop);
+    Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+    if ( c && !c->is_empty() ) {
+        /* We actually have something to write */
+
+        Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
+        /* Set style */
+        sp_desktop_apply_style_tool(desktop, repr, "/tools/connector", false);
+
+        gchar *str = sp_svg_write_path( c->get_pathvector() );
+        g_assert( str != NULL );
+        repr->setAttribute("d", str);
+        g_free(str);
+
+        /* Attach repr */
+        cc->newconn = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
+        cc->newconn->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();
+
+        bool connection = false;
+        cc->newconn->setAttribute( "inkscape:connector-type",
+                                   cc->isOrthogonal ? "orthogonal" : "polyline", NULL );
+        cc->newconn->setAttribute( "inkscape:connector-curvature",
+                                   Glib::Ascii::dtostr(cc->curvature).c_str(), NULL );
+        if (cc->shref)
+        {
+            cc->newconn->setAttribute( "inkscape:connection-start", cc->shref, NULL);
+            connection = true;
+        }
+
+        if (cc->ehref)
+        {
+            cc->newconn->setAttribute( "inkscape:connection-end", cc->ehref, NULL);
+            connection = true;
+        }
+        // Process pending updates.
+        cc->newconn->updateRepr();
+        doc->ensureUpToDate();
+
+        if (connection) {
+            // Adjust endpoints to shape edge.
+            sp_conn_reroute_path_immediate(SP_PATH(cc->newconn));
+            cc->newconn->updateRepr();
+        }
+
+        cc->newconn->doWriteTransform(cc->newconn->getRepr(), cc->newconn->transform, NULL, true);
+
+        // Only set the selection after we are finished with creating the attributes of
+        // the connector.  Otherwise, the selection change may alter the defaults for
+        // values like curvature in the connector context, preventing subsequent lookup
+        // of their original values.
+        cc->selection->set(repr);
+        Inkscape::GC::release(repr);
+    }
+
+    c->unref();
+
+    DocumentUndo::done(doc, SP_VERB_CONTEXT_CONNECTOR, _("Create connector"));
+}
+
+
+static void
+spcc_connector_finish_segment(ConnectorTool *const cc, Geom::Point const /*p*/)
+{
+    if (!cc->red_curve->is_empty()) {
+        cc->green_curve->append_continuous(cc->red_curve, 0.0625);
+
+        cc->p[0] = cc->p[3];
+        cc->p[1] = cc->p[4];
+        cc->npoints = 2;
+
+        cc->red_curve->reset();
+    }
+}
+
+
+static void
+spcc_connector_finish(ConnectorTool *const cc)
+{
+    SPDesktop *const desktop = cc->desktop;
+    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing connector"));
+
+    cc->red_curve->reset();
+    spcc_concat_colors_and_flush(cc);
+
+    cc->npoints = 0;
+
+    if (cc->newConnRef) {
+        cc->newConnRef->removeFromGraph();
+        delete cc->newConnRef;
+        cc->newConnRef = NULL;
+    }
+}
+
+
+static gboolean
+cc_generic_knot_handler(SPCanvasItem *, GdkEvent *event, SPKnot *knot)
+{
+    g_assert (knot != NULL);
+
+    g_object_ref(knot);
+
+    ConnectorTool *cc = SP_CONNECTOR_CONTEXT(
+            knot->desktop->event_context);
+
+    gboolean consumed = FALSE;
+
+    gchar const *knot_tip = "Click to join at this point";
+    switch (event->type) {
+        case GDK_ENTER_NOTIFY:
+            sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, TRUE);
+
+            cc->active_handle = knot;
+            if (knot_tip)
+            {
+                knot->desktop->event_context->defaultMessageContext()->set(
+                        Inkscape::NORMAL_MESSAGE, knot_tip);
+            }
+
+            consumed = TRUE;
+            break;
+        case GDK_LEAVE_NOTIFY:
+            sp_knot_set_flag(knot, SP_KNOT_MOUSEOVER, FALSE);
+
+            cc->active_handle = NULL;
+
+            if (knot_tip) {
+                knot->desktop->event_context->defaultMessageContext()->clear();
+            }
+
+            consumed = TRUE;
+            break;
+        default:
+            break;
+    }
+
+    g_object_unref(knot);
+
+    return consumed;
+}
+
+
+static gboolean
+endpt_handler(SPKnot */*knot*/, GdkEvent *event, ConnectorTool *cc)
+{
+    //g_assert( SP_IS_CONNECTOR_CONTEXT(cc) );
+
+    gboolean consumed = FALSE;
+
+    switch (event->type) {
+        case GDK_BUTTON_PRESS:
+            g_assert( (cc->active_handle == cc->endpt_handle[0]) ||
+                      (cc->active_handle == cc->endpt_handle[1]) );
+            if (cc->state == SP_CONNECTOR_CONTEXT_IDLE) {
+                cc->clickeditem = cc->active_conn;
+                cc->clickedhandle = cc->active_handle;
+                cc_clear_active_conn(cc);
+                cc->state = SP_CONNECTOR_CONTEXT_REROUTING;
+
+                // Disconnect from attached shape
+                unsigned ind = (cc->active_handle == cc->endpt_handle[0]) ? 0 : 1;
+                sp_conn_end_detach(cc->clickeditem, ind);
+
+                Geom::Point origin;
+                if (cc->clickedhandle == cc->endpt_handle[0]) {
+                    origin = cc->endpt_handle[1]->pos;
+                }
+                else {
+                    origin = cc->endpt_handle[0]->pos;
+                }
+
+                // Show the red path for dragging.
+                cc->red_curve = SP_PATH(cc->clickeditem)->get_curve_for_edit();
+                Geom::Affine i2d = (cc->clickeditem)->i2dt_affine();
+                cc->red_curve->transform(i2d);
+                sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(cc->red_bpath), cc->red_curve);
+
+                cc->clickeditem->setHidden(true);
+
+                // The rest of the interaction rerouting the connector is
+                // handled by the context root handler.
+                consumed = TRUE;
+            }
+            break;
+        default:
+            break;
+    }
+
+    return consumed;
+}
+
+static void cc_active_shape_add_knot(ConnectorTool *cc, SPItem* item)
+{
+        SPDesktop *desktop = cc->desktop;
+        SPKnot *knot = sp_knot_new(desktop, 0);
+
+        knot->owner = item;
+        knot->setShape(SP_KNOT_SHAPE_SQUARE);
+        knot->setSize(8);
+        knot->setAnchor(SP_ANCHOR_CENTER);
+        knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
+        sp_knot_update_ctrl(knot);
+
+        // We don't want to use the standard knot handler.
+        g_signal_handler_disconnect(G_OBJECT(knot->item),
+                knot->_event_handler_id);
+        knot->_event_handler_id = 0;
+
+        g_signal_connect(G_OBJECT(knot->item), "event",
+                G_CALLBACK(cc_generic_knot_handler), knot);
+        sp_knot_set_position(knot, item->avoidRef->getConnectionPointPos() * desktop->doc2dt(), 0);
+        sp_knot_show(knot);
+        cc->knots[knot] = 1;
+}
+
+static void cc_set_active_shape(ConnectorTool *cc, SPItem *item)
+{
+    g_assert(item != NULL );
+
+    if (cc->active_shape != item)
+    {
+        // The active shape has changed
+        // Rebuild everything
+        cc->active_shape = item;
+        // Remove existing active shape listeners
+        if (cc->active_shape_repr) {
+            sp_repr_remove_listener_by_data(cc->active_shape_repr, cc);
+            Inkscape::GC::release(cc->active_shape_repr);
+
+            sp_repr_remove_listener_by_data(cc->active_shape_layer_repr, cc);
+            Inkscape::GC::release(cc->active_shape_layer_repr);
+        }
+
+        // Listen in case the active shape changes
+        cc->active_shape_repr = item->getRepr();
+        if (cc->active_shape_repr) {
+            Inkscape::GC::anchor(cc->active_shape_repr);
+            sp_repr_add_listener(cc->active_shape_repr, &shape_repr_events, cc);
+
+            cc->active_shape_layer_repr = cc->active_shape_repr->parent();
+            Inkscape::GC::anchor(cc->active_shape_layer_repr);
+            sp_repr_add_listener(cc->active_shape_layer_repr, &layer_repr_events, cc);
+        }
+
+        cc_clear_active_knots(cc->knots);
+
+        // The idea here is to try and add a group's children to solidify
+        // connection handling. We react to path objects with only one node.
+        for (SPObject *child = item->firstChild() ; child ; child = child->getNext() ) {
+          if (SP_IS_PATH(child) && SP_PATH(child)->nodesInPath() == 1) {
+              cc_active_shape_add_knot(cc, (SPItem *) child);
+          }
+        }
+        cc_active_shape_add_knot(cc, item);
+
+    }
+    else
+    {
+        // Ensure the item's connection_points map
+        // has been updated
+        item->document->ensureUpToDate();
+    }
+}
+
+
+static void
+cc_set_active_conn(ConnectorTool *cc, SPItem *item)
+{
+    g_assert( SP_IS_PATH(item) );
+
+    const SPCurve *curve = SP_PATH(item)->get_curve_reference();
+    Geom::Affine i2dt = item->i2dt_affine();
+
+    if (cc->active_conn == item)
+    {
+        if (curve->is_empty())
+        {
+            // Connector is invisible because it is clipped to the boundary of
+            // two overlpapping shapes.
+            sp_knot_hide(cc->endpt_handle[0]);
+            sp_knot_hide(cc->endpt_handle[1]);
+        }
+        else
+        {
+            // Just adjust handle positions.
+            Geom::Point startpt = *(curve->first_point()) * i2dt;
+            sp_knot_set_position(cc->endpt_handle[0], startpt, 0);
+
+            Geom::Point endpt = *(curve->last_point()) * i2dt;
+            sp_knot_set_position(cc->endpt_handle[1], endpt, 0);
+        }
+
+        return;
+    }
+
+    cc->active_conn = item;
+
+    // Remove existing active conn listeners
+    if (cc->active_conn_repr) {
+        sp_repr_remove_listener_by_data(cc->active_conn_repr, cc);
+        Inkscape::GC::release(cc->active_conn_repr);
+        cc->active_conn_repr = NULL;
+    }
+
+    // Listen in case the active conn changes
+    cc->active_conn_repr = item->getRepr();
+    if (cc->active_conn_repr) {
+        Inkscape::GC::anchor(cc->active_conn_repr);
+        sp_repr_add_listener(cc->active_conn_repr, &shape_repr_events, cc);
+    }
+
+    for (int i = 0; i < 2; ++i) {
+
+        // Create the handle if it doesn't exist
+        if ( cc->endpt_handle[i] == NULL ) {
+            SPKnot *knot = sp_knot_new(cc->desktop,
+                    _("<b>Connector endpoint</b>: drag to reroute or connect to new shapes"));
+
+            knot->setShape(SP_KNOT_SHAPE_SQUARE);
+            knot->setSize(7);
+            knot->setAnchor(SP_ANCHOR_CENTER);
+            knot->setFill(0xffffff00, 0xff0000ff, 0xff0000ff);
+            knot->setStroke(0x000000ff, 0x000000ff, 0x000000ff);
+            sp_knot_update_ctrl(knot);
+
+            // We don't want to use the standard knot handler,
+            // since we don't want this knot to be draggable.
+            g_signal_handler_disconnect(G_OBJECT(knot->item),
+                    knot->_event_handler_id);
+            knot->_event_handler_id = 0;
+
+            g_signal_connect(G_OBJECT(knot->item), "event",
+                    G_CALLBACK(cc_generic_knot_handler), knot);
+
+            cc->endpt_handle[i] = knot;
+        }
+
+        // Remove any existing handlers
+        if (cc->endpt_handler_id[i]) {
+            g_signal_handlers_disconnect_by_func(
+                    G_OBJECT(cc->endpt_handle[i]->item),
+                    (void*)G_CALLBACK(endpt_handler), (gpointer) cc );
+            cc->endpt_handler_id[i] = 0;
+        }
+
+        // Setup handlers for connector endpoints, this is
+        // is as 'after' so that cc_generic_knot_handler is
+        // triggered first for any endpoint.
+        cc->endpt_handler_id[i] = g_signal_connect_after(
+                G_OBJECT(cc->endpt_handle[i]->item), "event",
+                G_CALLBACK(endpt_handler), cc);
+    }
+
+    if (curve->is_empty())
+    {
+        // Connector is invisible because it is clipped to the boundary 
+        // of two overlpapping shapes.  So, it doesn't need endpoints.
+        return;
+    }
+
+    Geom::Point startpt = *(curve->first_point()) * i2dt;
+    sp_knot_set_position(cc->endpt_handle[0], startpt, 0);
+
+    Geom::Point endpt = *(curve->last_point()) * i2dt;
+    sp_knot_set_position(cc->endpt_handle[1], endpt, 0);
+
+    sp_knot_show(cc->endpt_handle[0]);
+    sp_knot_show(cc->endpt_handle[1]);
+}
+
+void cc_create_connection_point(ConnectorTool* cc)
+{
+    if (cc->active_shape && cc->state == SP_CONNECTOR_CONTEXT_IDLE)
+    {
+        if (cc->selected_handle)
+        {
+            cc_deselect_handle( cc->selected_handle );
+        }
+        SPKnot *knot = sp_knot_new(cc->desktop, 0);
+        // We do not process events on this knot.
+        g_signal_handler_disconnect(G_OBJECT(knot->item),
+                                    knot->_event_handler_id);
+        knot->_event_handler_id = 0;
+
+        cc_select_handle( knot );
+        cc->selected_handle = knot;
+        sp_knot_show(cc->selected_handle);
+        cc->state = SP_CONNECTOR_CONTEXT_NEWCONNPOINT;
+    }
+}
+
+static bool cc_item_is_shape(SPItem *item)
+{
+    if (SP_IS_PATH(item)) {
+        const SPCurve * curve = (SP_SHAPE(item))->_curve;
+        if ( curve && !(curve->is_closed()) ) {
+            // Open paths are connectors.
+            return false;
+        }
+    }
+    else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
+        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+        if (prefs->getBool("/tools/connector/ignoretext", true)) {
+            // Don't count text as a shape we can connect connector to.
+            return false;
+        }
+    }
+    return true;
+}
+
+
+bool cc_item_is_connector(SPItem *item)
+{
+    if (SP_IS_PATH(item)) {
+        bool closed = SP_PATH(item)->get_curve_reference()->is_closed();
+        if (SP_PATH(item)->connEndPair.isAutoRoutingConn() && !closed) {
+            // To be considered a connector, an object must be a non-closed 
+            // path that is marked with a "inkscape:connector-type" attribute.
+            return true;
+        }
+    }
+    return false;
+}
+
+
+void cc_selection_set_avoid(bool const set_avoid)
+{
+    SPDesktop *desktop = inkscape_active_desktop();
+    if (desktop == NULL) {
+        return;
+    }
+
+    SPDocument *document = sp_desktop_document(desktop);
+
+    Inkscape::Selection *selection = sp_desktop_selection(desktop);
+
+    GSList *l = const_cast<GSList *>(selection->itemList());
+
+    int changes = 0;
+
+    while (l) {
+        SPItem *item = SP_ITEM(l->data);
+
+        char const *value = (set_avoid) ? "true" : NULL;
+
+        if (cc_item_is_shape(item)) {
+            item->setAttribute("inkscape:connector-avoid", value, NULL);
+            item->avoidRef->handleSettingChange();
+            changes++;
+        }
+
+        l = l->next;
+    }
+
+    if (changes == 0) {
+        desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
+                _("Select <b>at least one non-connector object</b>."));
+        return;
+    }
+
+    char *event_desc = (set_avoid) ?
+            _("Make connectors avoid selected objects") :
+            _("Make connectors ignore selected objects");
+    DocumentUndo::done(document, SP_VERB_CONTEXT_CONNECTOR, event_desc);
+}
+
+void ConnectorTool::selection_changed(Inkscape::Selection *selection) {
+    SPItem *item = selection->singleItem();
+
+    if (this->active_conn == item) {
+        // Nothing to change.
+        return;
+    }
+
+    if (item == NULL) {
+        cc_clear_active_conn(this);
+        return;
+    }
+
+    if (cc_item_is_connector(item)) {
+        cc_set_active_conn(this, item);
+    }
+}
+
+static void
+shape_event_attr_deleted(Inkscape::XML::Node */*repr*/, Inkscape::XML::Node *child,
+                         Inkscape::XML::Node */*ref*/, gpointer data)
+{
+    g_assert(data);
+    ConnectorTool *cc = SP_CONNECTOR_CONTEXT(data);
+
+    if (child == cc->active_shape_repr) {
+        // The active shape has been deleted.  Clear active shape.
+        cc_clear_active_shape(cc);
+    }
+}
+
+
+static void
+shape_event_attr_changed(Inkscape::XML::Node *repr, gchar const *name,
+                         gchar const */*old_value*/, gchar const */*new_value*/,
+                         bool /*is_interactive*/, gpointer data)
+{
+    g_assert(data);
+    ConnectorTool *cc = SP_CONNECTOR_CONTEXT(data);
+
+    // Look for changes that result in onscreen movement.
+    if (!strcmp(name, "d") || !strcmp(name, "x") || !strcmp(name, "y") ||
+            !strcmp(name, "width") || !strcmp(name, "height") ||
+            !strcmp(name, "transform"))
+    {
+        if (repr == cc->active_shape_repr) {
+            // Active shape has moved. Clear active shape.
+            cc_clear_active_shape(cc);
+        }
+        else if (repr == cc->active_conn_repr) {
+            // The active conn has been moved.
+            // Set it again, which just sets new handle positions.
+            cc_set_active_conn(cc, cc->active_conn);
+        }
+    }
+}
+
+}
+}
+}
+
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :